Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-42794--1, Page 169Get this manual
NOTE: Push rod (on some models) may have one flat end and one pointed end Install with flat end toward ballPush rods with two pointed ends can be installed in either direction4Install push rod, ball, flat spring and screw in valve block5Torque screw to 27 lbin(3.0 Nm) 6Install spool, springlubricated a-ring and screw plug (surge valve assembly) into valve block7Torque screw plug to 75 lbin(8.3 Nm)